Patent Watch

October 10, 2011

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The following patent record is from the CAplusSM database.

CAPLUS COPYRIGHT 2011 ACS

Patent Number:

US 8026387

Title:

Preparation of isocyanates from polyureas formed by polyamine and urea

Inventor(s):

Kloetzer, Matthias; Stroefer, Eckhard; Blankertz, Heinrich-Josef

Patent Assignee(s):

BASF A.-G., Germany

Source:

PCT Int. Appl., 30pp. CODEN: PIXXD2

Language:

German

Abstract:Organic, distillable polyisocyanates, preferably diisocyanates, especially preferred aliphatic or cycloaliph. diisocyanates, are prepared continuously by reacting the corresponding organic polyamines with urea to give low-mol. monomeric polyureas, and subsequently thermally decomposing the polyureas.Please note: Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention. In this example, CAS enhanced the title using additional information found in the patent. The original title of the U.S. granted patent is Method for producing isocyanates. For the CAplus record, this title was enhanced to read Preparation of isocyanates from polyureas formed by polyamine and urea.